A time-history analysis method for floor response spectra of nuclear power plants

A technology of response spectrum and analysis method, applied in the direction of complex mathematical operations, etc., can solve the problem of insufficient calculation accuracy of the high frequency part of the floor response spectrum

Active Publication Date: 2019-03-22
INST OF ENG MECHANICS CHINA EARTHQUAKE ADMINISTRATION
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Problems solved by technology

[0005] Aiming at the problem of insufficient calculation accuracy of the high-frequency part of the floor response spectrum by the existing time course method, the purpose of the present invention is to provide an accurate floor response spectrum for nuclear power plant time history analysis method

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  • A time-history analysis method for floor response spectra of nuclear power plants
  • A time-history analysis method for floor response spectra of nuclear power plants
  • A time-history analysis method for floor response spectra of nuclear power plants

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with specific examples, but the present invention is not limited to these specific implementations. Those skilled in the art will realize that the present invention covers all alternatives, modifications and equivalents as may be included within the scope of the claims.

[0039] Below in conjunction with accompanying drawing, structural principle and working principle of the present invention are specifically described:

[0040] Taking a single-degree-of-freedom system simplified by high-frequency nuclear power equipment as an example, the dynamic analysis method of the present invention is specifically described. The single-degree-of-freedom system is as follows figure 1 As shown, its damping ratio is 0.02; the dynamic time-history analysis method comprises the following steps:

[0041] In the first step, the nuclear power equipment 1 is simplified into a single-degree-of-freedom damping system. The ...

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Abstract

The invention relates to a high-precision time-history analysis method for calculating the floor spectrum of a nuclear power plant. The method comprises the following steps: 1, simplifying the nuclearpower equipment into a single-degree-of-freedom damping system, establishing a motion equation, selecting a damping ratio and a frequency of the equipment; 2, selecting an analysis step length; Step3: Calculate step by step. For the i-th time step, ti is known. 3,. Calculating displacement, velocity and absolute acceleration at ti time on i time step from the recurrence formula listed in the invention; 4,calculating the peak value of the acceleration response curve as the floor spectrum value of the given frequency and damping ratio, which is used to draw the floor spectrum. Compared with the existing floor spectrum calculation software, the time-history analysis method of the invention has higher solution precision, simple operation steps and easy implementation, and has strong engineering application value.

Description

technical field [0001] The invention relates to a time-course analysis method for the floor response spectrum of a nuclear power plant. Background technique [0002] With the rapid development of my country's economy, the demand for energy has increased sharply. At the same time, the problem of global warming and environmental pollution caused by excessive emissions of greenhouse gases has also troubled people. More and more people are turning their attention to nuclear energy. The advantages of nuclear power, such as high efficiency and cleanliness, and the promotion of the development needs of my country's national economy have prompted the vigorous development of nuclear power. At the same time, the consequences of nuclear leakage are extremely serious, and earthquakes are one of the important factors affecting nuclear safety. On July 17, 2007, a strong earthquake of magnitude 6.8 occurred in Niigata Prefecture, Japan, resulting in the outage of four units in TEPCO Liuyu...

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Application Information

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IPC IPC(8): G06F17/12
CPCG06F17/12Y02E60/00
Inventor 徐俊杰钟博王涛孙运轮
Owner INST OF ENG MECHANICS CHINA EARTHQUAKE ADMINISTRATION
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